Buy a Kimber .45 ACP CDP Custom.
I have carried a Beretta 84S in a .380 for several years. At the range, I’ve fired winchester FMJ in 90 grains without a misfire. Approximately 1500 rounds in it’s life. I can only speak from classroom experience as I’ve never been in an actual shootout.. but theory…Most self defense shootings occur at close range and at night..
Regardless of caliber, make sure you have adequate “time on the water” shooting in low light conditions so when/if the time ever comes..you’ve rehearsed it well enough in your head to instinctively hit your target.
In terms of quality, I can only speak for my Beretta. It’s a great gun but oddly enough it’s got a mis-print in the side of it… “Does not fires without magazine”
Enjoy ! Did I mention a Kimber ?